Basis of Presentation (Policies)	12 Months Ended
Basis of Presentation (Policies)	Dec. 31, 2015
Accounting Policies [Abstract]
Consolidation	Consolidation The accompanying consolidated financial statements include the accounts of Bimini Capital, Bimini Advisors and MortCo. The accounts of Orchid are included in the consolidated statements of operations, equity and cash flows until December 31, 2014. All inter-company accounts and transactions have been eliminated from the consolidated financial statements. Financial Accounting Standards Board (the “FASB”) Accounting Standards Codification (“ASC”) Topic 810, Consolidation (“ASC 810”), requires the consolidation of a VIE by an enterprise if it is deemed the primary beneficiary of the VIE. Further, ASC 810 requires a qualitative assessment to determine the primary beneficiary of a VIE, an ongoing assessment of whether an enterprise is the primary beneficiary of a VIE, and additional disclosures for entities that have variable interests in VIEs. From the effective date of Orchid’s IPO and until December 31, 2014, management concluded pursuant to ASC 810 that Orchid was a VIE. As a result, subsequent to Orchid’s IPO and until December 31, 2014, the Company consolidated Orchid in its financial statements. The results of operations of Orchid are included in the Company’s 2014 consolidated statements of operations and cash flows, however, net income attributable to Bimini Capital stockholders did not include the portion of net income attributable to noncontrolling interests. In December 2014, management re-evaluated the conditions resulting in the consolidation of Orchid and concluded that, due to Bimini’s decreased percentage ownership interest in Orchid, there was no longer a variable interest requiring consolidation. As a result, in accordance with ASC 810, the Company has deconsolidated Orchid from the consolidated balance sheet as of December 31, 2014. However, as a VIE which was deconsolidated on December 31, 2014, Orchid’s results of operations were included in the consolidated statements of operations, equity and cash flows through December 31, 2014, and are excluded in subsequent periods. As further described in Note 9, Bimini Capital has a common share investment in a trust used in connection with the issuance of Bimini Capital’s junior subordinated notes. Pursuant to ASC 810, Bimini Capital’s common share investment in the trust has not been consolidated in the financial statements of Bimini Capital, and accordingly, this investment has been accounted for on the equity method.
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements are prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States (“GAAP”). In the opinion of management, all adjustments considered necessary for a fair presentation of the Company's consolidated financial position, results of operations and cash flows have been included and are of a normal and recurring nature.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates affecting the accompanying consolidated financial statements include the fair values of MBS, investment in Orchid common shares, derivatives, retained interests and asset valuation allowances and the level of deferred tax asset allowances recorded for each accounting period.
Statement of Comprehensive Income	Statement of Comprehensive Income In accordance with ASC Topic 220, Comprehensive Income, a statement of comprehensive income has not been included as the Company has no items of other comprehensive income. Comprehensive income is the same as net income for all periods presented.
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on deposit with financial institutions and highly liquid investments with original maturities of three months or less at the time of purchase. At December 31, 2015, restricted cash consisted of approximately $0.4 million of cash held by a broker as margin on Eurodollar futures contracts. At December 31, 2014, restricted cash consisted of approximately $0.5 million of cash held by a broker as margin on Eurodollar futures contracts and $0.3 million of cash held on deposit as collateral with repurchase agreement counterparties. The Company maintains cash balances at four banks, and, at times, balances may exceed federally insured limits. The Company has not experienced any losses related to these balances. The Federal Deposit Insurance Corporation insures eligible accounts up to $250,000 per depositor at each financial institution. At December 31, 2015, the Company’s cash deposits exceeded federally insured limits by approximately $3.8 million. Restricted cash balances are uninsured, but are held in separate customer accounts that are segregated from the general funds of the counterparty. The Company limits uninsured balances to only large, well-known banks and derivative counterparties and believes that it is not exposed to significant credit risk on cash and cash equivalents or restricted cash balances.
Mortgage-Backed Securities	Mortgage-Backed Securities The Company invests primarily in mortgage pass-through (“PT”) certificates, collateralized mortgage obligations, and interest-only (“IO”) securities and inverse interest-only (“IIO”) securities representing interest in or obligations backed by pools of mortgage-backed loans. The Company has elected to account for its investment in MBS under the fair value option. Electing the fair value option requires the Company to record changes in fair value in the consolidated statement of operations, which, in management’s view, more appropriately reflects the results of our operations for a particular reporting period and is consistent with the underlying economics and how the portfolio is managed. The Company records MBS transactions on the trade date. Security purchases that have not settled as of the balance sheet date are included in the MBS balance with an offsetting liability recorded, whereas securities sold that have not settled as of the balance sheet date are removed from the MBS balance with an offsetting receivable recorded. The fair value of the Company’s investment in MBS is governed by ASC Topic 820, Fair Value Measurement. The definition of fair value in ASC Topic 820 focuses on the price that would be received to sell the asset or paid to transfer the liability in an orderly transaction between market participants at the measurement date. The fair value measurement assumes that the transaction to sell the asset or transfer the liability either occurs in the principal market for the asset or liability, or in the absence of a principal market, occurs in the most advantageous market for the asset or liability. Estimated fair values for MBS are based on independent pricing sources and/or third party broker quotes, when available. Income on PT MBS is based on the stated interest rate of the security. Premiums or discounts present at the date of purchase are not amortized. Premium lost and discount accretion resulting from monthly principal repayments are reflected in unrealized gains (losses) on MBS in the consolidated statements of operations. For IO securities, the income is accrued based on the carrying value and the effective yield. The difference between income accrued and the interest received on the security is characterized as a return of investment and serves to reduce the asset’s carrying value. At each reporting date, the effective yield is adjusted prospectively from the reporting period based on the new estimate of prepayments and the contractual terms of the security. For IIO securities, effective yield and income recognition calculations also take into account the index value applicable to the security. Changes in fair value of MBS during each reporting period are recorded in earnings and reported as unrealized gains or losses on mortgage-backed securities in the accompanying consolidated statements of operations. The amount reported as unrealized gains or losses on mortgage backed securities thus captures the net effect of changes in the fair market value of securities caused by market developments and any premium or discount lost as a result of principal repayments during the period.
Investment In Orchid [Policy Text Block]	Orchid Island Capital, Inc. Common Stock At the date of Orchid’s deconsolidation, the Company elected the fair value option for its continuing investment in Orchid common shares. The change in the fair value of this investment and dividends received on this investment are reflected in other income in the consolidated statements of operations for the year ended December 31, 2015. We estimate the fair value of our investment in Orchid on a market approach using “Level 1” inputs based on the quoted market price of Orchid’s common stock. Electing the fair value option requires the Company to record changes in fair value in the consolidated statements of operations, which, in management’s view, more appropriately reflects the results of our operations for a particular reporting period and is consistent with how the investment is managed.
Advisory Services	Advisory Services Upon completion of its initial public offering, Orchid became externally managed and advised by Bimini Advisors pursuant to the terms of a management agreement. Under the terms of the management agreement Orchid is obligated to pay Bimini Advisors a monthly management fee and a pro rata portion of certain overhead costs and to reimburse the Company for any direct expenses incurred on its behalf.
Retained Interests	Retained Interests in Securitizations Retained interests in the subordinated tranches of securities created in securitization transactions were initially recorded at their fair value when issued by MortCo. Subsequent adjustments to fair value are reflected in earnings. Quoted market prices for these assets are generally not available, so the Company estimates fair value based on the present value of expected future cash flows using management’s best estimates of key assumptions, which include expected credit losses, prepayment speeds, weighted-average life, and discount rates commensurate with the inherent risks of the asset.
Derivative Financial Instruments	Derivative Financial Instruments The Company uses derivative instruments to manage interest rate risk, facilitate asset/liability strategies and manage other exposures, and it may continue to do so in the future. The principal instruments that the Company has used to date are T-Note and Eurodollar futures contracts and options to enter in interest rate swaps (“interest rate swaptions”), but may enter into other derivatives in the future. The Company has elected not to treat any of its derivative financial instruments as hedges in order to align the accounting treatment of its derivative instruments with the treatment of its portfolio assets under the fair value option election. FASB ASC Topic 815, Derivatives and Hedging, requires that all derivative instruments be carried at fair value. Changes in fair value are recorded in earnings for each period. Holding derivatives creates exposure to credit risk related to the potential for failure on the part of counterparties to honor their commitments. In addition, the Company may be required to post collateral based on any declines in the market value of the derivatives. In the event of default by a counterparty, the Company may have difficulty recovering its collateral and may not receive payments provided for under the terms of the agreement. To mitigate this risk, the Company uses only well-established commercial banks as counterparties.
Financial Instruments	Financial Instruments ASC Topic 825, Financial Instruments, requires disclosure of the fair value of financial instruments for which it is practicable to estimate that value, either in the body of the financial statements or in the accompanying notes. MBS, the Company’s investment in Orchid, Eurodollar futures contracts, interest rate swaptions and retained interests in securitization transactions are accounted for at fair value in the consolidated balance sheets. The methods and assumptions used to estimate fair value for these instruments are presented in Note 15 of the consolidated financial statements. The estimated fair value of cash and cash equivalents, restricted cash, accrued interest receivable, other assets, repurchase agreements, payable for unsettled securities purchased, accrued interest payable and other liabilities generally approximates their carrying value as of December 31, 2015 and December 31, 2014, due to the short-term nature of these financial instruments. It is impractical to estimate the fair value of the Company’s junior subordinated notes. Currently, there is a limited market for these types of instruments and the Company is unable to ascertain what interest rates would be available to the Company for similar financial instruments. Information regarding carrying amount, effective interest rate and maturity date for these instruments is presented in Note 9 to the consolidated financial statements.
Property and Equipment, net	Property and Equipment, net Property and equipment, net, consists of computer equipment with a depreciable life of 3 years, office furniture and equipment with depreciable lives of 8 to 20 years, land which has no depreciable life, and buildings and improvements with depreciable lives of 30 years. Property and equipment is recorded at acquisition cost and depreciated using the straight-line method over the estimated useful lives of the assets.
Repurchase Agreements	Repurchase Agreements The Company finances the acquisition of the majority of its PT MBS through the use of repurchase agreements under master repurchase agreements. Pursuant to ASC Topic 860, Transfers and Servicing, the Company accounts for repurchase transactions as collateralized financing transactions, which are carried at their contractual amounts, including accrued interest, as specified in the respective agreements.
Share-Based Compensation	Share-Based Compensation The Company follows the provisions of ASC Topic 718, Compensation – Stock Compensation, to account for stock and stock-based awards. For stock and stock-based awards issued to employees, a compensation charge is recorded against earnings over the vesting period based on the fair value of the award. Payments pursuant to dividend equivalent rights, which are granted along with certain equity based awards, are charged to stockholders’ equity when dividends are declared. The Company applies a zero forfeiture rate for its equity based awards, as such awards have been granted to a limited number of employees and historical forfeitures have been minimal. A significant forfeiture, or an indication that significant forfeitures may occur, would result in a revised forfeiture rate which would be accounted for prospectively as a change in an estimate. For transactions with non-employees in which services are performed in exchange for the Company’s common stock or other equity instruments, the transactions are recorded on the basis of the fair value of the service received or the fair value of the equity instruments issued, whichever is more readily measurable at the date of issuance.
Earnings Per Share	Earnings Per Share The Company follows the provisions of ASC Topic 260, Earnings Per Share, which requires companies with complex capital structures, common stock equivalents or two (or more) classes of securities that participate in dividend distributions to present both basic and diluted earnings per share (“EPS”) on the face of the consolidated statement of operations. Basic EPS is calculated as income available to common stockholders divided by the weighted average number of common shares outstanding during the period. Diluted EPS is calculated using the treasury stock or two-class method, as applicable for common stock equivalents. However, the common stock equivalents are not included in computing diluted EPS if the result is anti-dilutive. Outstanding shares of Class B Common Stock, participating and convertible into Class A Common Stock, are entitled to receive dividends in an amount equal to the dividends declared on each share of Class A Common Stock if, as and when authorized and declared by the Board of Directors. Accordingly, shares of the Class B Common Stock are included in the computation of basic EPS using the two-class method and, consequently, are presented separately from Class A Common Stock. The shares of Class C Common Stock are not included in the basic EPS computation as these shares do not have participation rights. The outstanding shares of Class B and Class C Common Stock are not included in the computation of diluted EPS for the Class A Common Stock as the conditions for conversion into shares of Class A Common Stock were not met.
Income Taxes	Income Taxes Through December 31, 2014, Bimini Capital was taxed as a real estate investment trust (“REIT”) under the Internal Revenue Code of 1986, as amended (the “Code”). REITs are generally not subject to federal income tax on their REIT taxable income provided that they distribute to their stockholders at least 90% of their REIT taxable income on an annual basis. In addition, a REIT must meet other provisions of the Code to retain its tax status. See Note 13 for an additional discussion of the termination of Bimini Capital’s REIT status effective January 1, 2015. Bimini Advisors and MortCo are taxpaying entities for income tax purposes and are taxed separately from Bimini Capital. Income taxes are provided for using the asset and liability method. Deferred tax assets and liabilities represent the differences between the financial statement and income tax bases of assets and liabilities using enacted tax rates. The measurement of net deferred tax assets is adjusted by a valuation allowance if, based on the Company’s evaluation, it is more likely than not that they will not be realized. The Company’s U.S. federal income tax returns for years ended on or after December 31, 2012 remain open for examination. Although management believes its calculations for tax returns are correct and the positions taken thereon are reasonable, the final outcome of tax audits could be materially different from the tax returns filed by the Company, and those differences could result in significant costs or benefits to the Company. The Company measures, recognizes and presents its uncertain tax positions in accordance with ASC Topic 740, Income Taxes. Under that guidance, the Company assesses the likelihood, based on their technical merit, that tax positions will be sustained upon examination based on the facts, circumstances and information available at the end of each period. The measurement of uncertain tax positions is adjusted when new information is available, or when an event occurs that requires a change. The Company recognizes tax positions in the financial statements only when it is more likely than not that the position will be sustained upon examination by the relevant taxing authority based on the technical merits of the position. A position that meets this standard is measured at the largest amount of benefit that will more likely than not be realized upon settlement. The difference between the benefit recognized and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit and is recorded as a liability in the consolidated balance sheets. The Company records income tax-related interest and penalties, if applicable, within the income tax provision.
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2016, the FASB issued Accounting Standards Update (“ASU”) 2016-01, Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities. ASU 2016-01, provides guidance for the recognition, measurement, presentation and disclosure of financial assets and financial liabilities. ASU 2016-01 is effective for fiscal years, and for interim periods within those years, beginning after December 15, 2017 and, for most provisions, is effective using the cumulative-effect transition approach. Early application is permitted for certain provisions. The Company is currently evaluating the potential effect of this ASU on its consolidated financial statements. In November 2015, the FASB issued ASU 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes. ASU 2015-17 requires that all deferred tax liabilities and tax assets be classified as non-current in a classified balance sheet, rather than separating such deferred taxes into current and non-current amounts, as is required under current guidance. ASU 2015-17 is effective for fiscal years, and for interim periods within those years, beginning after December 15, 2016 and may be applied either prospectively or retrospectively. The ASU is not expected to materially impact the Company’s consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement. ASU 2015-05 provides guidance for determining whether a cloud computing arrangement includes a software license and requires that all software licenses within the scope of Subtopic 350-40 be accounted for in a manner consistent with other licenses of intangible assets. ASU 2015-05, for which early application is permitted, is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015, with retrospective application permitted for all relevant prior periods The ASU is not expected to materially impact the Company’s consolidated financial statements. In February 2015, the FASB issued ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis. ASU 2015-02 changes the evaluation that a reporting entity must perform to determine whether it should consolidate certain types of legal entities, reduces the number of consolidation models and places emphasis on risk of loss when determining a controlling financial interest. Under ASU 2015-02, all entities are within the scope of Accounting Standards Codification (“ASC”) Subtopic 810, Consolidation, including limited partnerships and similar legal entities, unless a scope exception applies. The presumption that a general partner controls a limited partnership has been eliminated. In addition, fees paid to decision makers that meet certain conditions no longer cause consolidation of VIEs in certain instances. The amendments place more emphasis on variable interests other than fee arrangements and reduce the extent to which related party arrangements cause an entity to be considered a primary beneficiary. ASU 2015-02 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2015. Early application is permitted. The ASU is not expected to materially impact the Company’s consolidated financial In June 2014, the FASB issued ASU 2014-12, Compensation-Stock Compensation: Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. ASU 2014-12 requires that performance targets that affect vesting and that could be achieved after the requisite service period be treated as performance conditions. The effective date of ASU 2014-12 is for interim and annual reporting periods beginning after December 15, 2015. The ASU is not expected to materially impact the Company’s consolidated financial statements. In June 2014, the FASB issued ASU 2014-11, Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures. ASU 2014-11 amends the accounting guidance for repurchase-to-maturity transactions and repurchase agreements executed as repurchase financings, and requires additional disclosure about certain transactions by the transferor. ASU 2014-11 is effective for certain transactions that qualify for sales treatment for the first interim or annual period beginning after December 15, 2014. The new disclosure requirements for repurchase agreements, securities lending transactions and repurchase-to-maturity transactions that qualify for secured borrowing treatment is effective for annual periods beginning after December 15, 2014 and for interim periods beginning after March 15, 2015. The adoption of this ASU did not have a material impact on the Company’s consolidated financial statements. In July 2013, the FASB issued ASU 2013-11, Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists. This new standard requires the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. Under the new standard, unrecognized tax benefits will be netted against all available same-jurisdiction loss or other tax carryforwards that would be utilized, rather than only against carryforwards that are created by the unrecognized tax benefits. The ASU became effective beginning January 1, 2014 on either a prospective or retrospective basis. The guidance represents a change in financial statement presentation only and the adoption of this ASU did not have any impact on the Company’s consolidated financial results.